Paul Farmer is Professor of Medical Anthropology at Harvard Medical School and Founding Director of Partners In Health. Among his books are "Infections and Inequalities: The Modern Plagues "(California, 1999), "The Uses of Haiti "(1994), and "AIDS and Accusation: Haiti and the Geography of Blame "(California, 1992). Farmer is the winner of a MacArthur Foundation "genius" award and the Margaret Mead Award for his contributions to public anthropology. He recently held the Blaise Pascal International Chair at the College de France. Amartya Sen, whose work challenges conventional market-driven economic paradigms, is the winner of the 1998 Nobel Prize in economics. He teaches at Trinity College, Cambridge University.